Electrochemical behavior of LaCl3 and morphology of La deposit on molybdenum substrate in molten LiCl–KCl eutectic salt

Tang, Hao; Pešić, Batrić

doi:10.1016/j.electacta.2013.11.148

Cited by 116 publications

(107 citation statements)

References 29 publications

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“…reference electrode (E Ã0 CeðIIIÞ=Ceð0Þ ðvs:ðAg/Ag þ Þ=VÞ) were changed into ones versus the Cl 2 /Cl -reference electrode (E CeðIIIÞ=Ceð0Þ Ã0 ðvs:ðCl 2 =Cl À Þ=VÞ), which can be expressed [14]: The relationship of Ag/Ag ? reference electrode and the Cl 2 /Cl -reference electrode was according to the following equation:…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

Electrochemical behavior of cerium(III) in NaCl–KCl molten salt

Yang

Lin

et al. 2014

J Radioanal Nucl Chem

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This work presented the electrochemical study of cerium(III) on the insert electrode (Mo) in NaCl-KCl molten salt in the temperature range 954-1,007 K. The electrochemical methods such as cyclic voltammetry and square wave voltammetry were used for investigating the reduction of Ce(III). The results obtained showed that CeCl 3 could be reduced into cerium metal in a quasireversible one-step process exchanging three electrons (Ce(III)?3e ? Ce(0)) at the operating temperatures on a molybdenum cathode. The diffusion coefficients of Ce(III) ions at different temperatures were determined by cyclic voltammetry. The validity of the Arrhenius law was also verified and the activation energy for diffusion was found to be 46.0 kJ mol -1 . The apparent standard potentials of the redox couple (Ce(III)/Ce(0)) at several temperatures was calculated. The thermodynamic properties of cerium trichloride have also been investigated.

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Section: Cyclic Voltammetrymentioning

confidence: 99%

Electrochemical behavior of cerium(III) in NaCl–KCl molten salt

Yang

Lin

et al. 2014

J Radioanal Nucl Chem

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“…The ratio would be unity for the reduction leading to an insoluble deposit on the electrode. [56][57][58][59] Here the ratio τ2/τ1 is found to be about 1/5.9, indicating the reduction product (Fe) forms a solid solution alloy with the Ir substrate. Further, the smaller τ2/τ1 ratio may be caused by relatively slow oxidation of Fe from the alloy electrode.…”

Section: Pccp Papermentioning

confidence: 99%

“…12. However, this linear relation does not necessarily mean the reduction of Fe 2+ to be reversible because the number of exchanged electrons as calculated 56,57,59,47,73 from the following Eq. (10) ranged between 4 and 6 based on the peak C2 in Fig.…”

Section: Square Wave Voltammetry (Swv)mentioning

confidence: 99%

“…However suitable degrees of compensation reported in literatures do not agree with each other. 4,59,64 In this work, the cell was non-conventional and the structure of the molten silicate slag containing iron oxide is also very complex. 65 Thus, a change in the concentration of electroactive species caused by the electrode reaction may have a certain effect on the structure and properties (especially local electrical conductivity and viscosity) of the slag electrolyte in the vicinity of the Ir electrode.…”

Section: Please Do Not Adjust Marginsmentioning

confidence: 99%

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Magnesia-stabilised zirconia solid electrolyte assisted electrochemical investigation of iron ions in a SiO₂–CaO–MgO–Al₂O₃molten slag at 1723 K

Gao

Yang

Zhang

et al. 2017

Phys. Chem. Chem. Phys.

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Production of metallic iron through molten oxide electrolysis using inert electrodes is an alternative route for fast ironmaking without CO2 emissions. The fact that many inorganic oxides melt at ultrahigh temperatures (>1500 K) challenges conventional electro-analytical techniques used in aqueous, organic and molten salt electrolytes. However, in order to design a feasible and effective electrolytic process, it is necessary to best understand the electrochemical properties of iron ions in molten oxide electrolytes. In this work, a magnesia-stabilised zirconia (MSZ) tube with a closed end was used to construct an integrated three-electrode cell with the "MSZ | Pt | O2 (air)" assembly functioning as the solid electrolyte, the reference electrode and also the counter electrode. Electrochemical reduction of iron ions was systematically investigated on an iridium (Ir) wire working electrode in the SiO2-CaO-MgO-Al2O3 molten slag at 1723 K by cyclic voltammetry (CV), square wave voltammetry (SWV), chronopotentiometry (CP) and potentiostatic electrolysis (PE). The results show that the electroreduction of the Fe 2+ ion to Fe on the Ir electrode in the molten slag follows a single twoelectron transfer step, and the rate of the process is diffusion controlled. The peak current on the obtained CVs is proportional to the concentration of the Fe 2+ ion in the molten slag and the square root of scan rate. The diffusion coefficient of Fe 2+ ions in the molten slag containing 5 wt% FeO at 1723 K was derived to be (3.43 ± 0.06)×10 -6 cm 2 s -1 from CP analysis. However, a couple of following processes, i.e. alloy formation on the Ir electrode surface and interdiffusion were found to affect the kinetics of iron deposition. An ECC mechanism is proposed to account for the CV observations. The findings from this work confirm that zirconia-based solid electrolytes can play an important role in electrochemical fundamental research in high temperature molten slag electrolytes.

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“…This behavior is expected when only the reduced species can adsorb 26 and has been observed experimentally. 27 In addition, the separation between the adsorption peak and the peak due to diffusive electron transfer may be taken as a qualitative measure of adsorption. 26 Figure 5(a) shows that the peak separation is the largest when the adsorption probability is highest in agreement with our understanding of the situation.…”

Section: The Effect Of Kinetics and Adsorptionmentioning

confidence: 99%

A one-dimensional stochastic approach to the study of cyclic voltammetry with adsorption effects

Samin

2016

AIP Advances

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In this study, a one-dimensional stochastic model based on the random walk approach is used to simulate cyclic voltammetry. The model takes into account mass transport, kinetics of the redox reactions, adsorption effects and changes in the morphology of the electrode. The model is shown to display the expected behavior. Furthermore, the model shows consistent qualitative agreement with a finite difference solution. This approach allows for an understanding of phenomena on a microscopic level and may be useful for analyzing qualitative features observed in experimentally recorded signals.

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Electrochemical behavior of LaCl3 and morphology of La deposit on molybdenum substrate in molten LiCl–KCl eutectic salt

Cited by 116 publications

References 29 publications

Electrochemical behavior of cerium(III) in NaCl–KCl molten salt

Electrochemical behavior of cerium(III) in NaCl–KCl molten salt

Magnesia-stabilised zirconia solid electrolyte assisted electrochemical investigation of iron ions in a SiO₂–CaO–MgO–Al₂O₃molten slag at 1723 K

A one-dimensional stochastic approach to the study of cyclic voltammetry with adsorption effects

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Electrochemical behavior of LaCl3 and morphology of La deposit on molybdenum substrate in molten LiCl–KCl eutectic salt

Cited by 116 publications

References 29 publications

Electrochemical behavior of cerium(III) in NaCl–KCl molten salt

Electrochemical behavior of cerium(III) in NaCl–KCl molten salt

Magnesia-stabilised zirconia solid electrolyte assisted electrochemical investigation of iron ions in a SiO2–CaO–MgO–Al2O3molten slag at 1723 K

A one-dimensional stochastic approach to the study of cyclic voltammetry with adsorption effects

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Magnesia-stabilised zirconia solid electrolyte assisted electrochemical investigation of iron ions in a SiO₂–CaO–MgO–Al₂O₃molten slag at 1723 K